JPS6421867U

JPS6421867U -

Info

Publication number: JPS6421867U
Application number: JP11713087U
Authority: JP
Priority date: 1987-07-30
Filing date: 1987-07-30
Publication date: 1989-02-03

Description

[Brief explanation of the drawing]

第１図はこの考案の逆止弁の一実施例を示す縦
断面図、第２図は上記逆止弁の要部部分断面図、
第３図は逆止弁の適用される冷凍装置の冷媒回路
図、第４図は従来の逆止弁の縦断面図である。２１……弁本体、２２……入口通路、２３……
出口通路、２４……流路、２７……弁座、２８…
…弁体、２９……弁軸、３０……支持部材、３３
……被ガイド部、３７……周面、３８……ガイド
面、３９……ガイド部。 FIG. 1 is a vertical sectional view showing an embodiment of the check valve of this invention, FIG. 2 is a partial sectional view of the main part of the check valve,
FIG. 3 is a refrigerant circuit diagram of a refrigeration system to which the check valve is applied, and FIG. 4 is a longitudinal sectional view of a conventional check valve. 21... Valve body, 22... Inlet passage, 23...
Outlet passage, 24...flow path, 27...valve seat, 28...
... Valve body, 29 ... Valve stem, 30 ... Support member, 33
... Guided part, 37 ... Circumferential surface, 38 ... Guide surface, 39 ... Guide portion.

Claims

[Scope of utility model registration request]

The valve body 21 has an inlet passage 22 and an outlet passage 23.
and a flow path 2 that communicates both of these paths 22 and 23.
A valve seat 27 is provided in the flow path 24, and a valve body 28 is provided in a position closer to the outlet passage 23 than the valve seat 27 so that the valve body 28 can come into contact with the valve seat 27 and move away from the valve seat 27. The check valve is a check valve in which a valve shaft 29 is attached to the valve body 28, and the valve shaft 29 is movably supported by a support member 30 provided in the flow path 24. A guided portion 33 that moves together with the valve body 28 is provided at a position near the valve seat 27 side of the valve body 28 , and a peripheral surface 37 of the guided portion 33 is brought into sliding contact with the guided portion 33 .
A guide portion 39 having a guide surface 38 for guiding is disposed in the flow path 24, and the guide surface 38 allows the valve body 28 to move from the time when it is located near the valve seat 27 until it comes into contact with the valve seat 27. A check valve characterized in that the valve body 28 is guided so as to directly face the valve seat 27 during the period of time.